Preparation method and application of superparamagnetic Fe3O4 nano material

A nanomaterial and superparamagnetic technology, applied in the field of nanomaterials, can solve the problems of low purity, poor crystallinity and magnetic properties, and complicated preparation process of the hydrothermal reaction method, and achieve easy control of product composition, high adsorption performance, and conditions easy to control effect

Active Publication Date: 2016-02-03
HEFEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the entire preparation process of the co-precipitation method needs to be carried out under the protection of an inert gas, resulting in a complicated preparation process.
At the same time, this method is generally carried out at low temperature, and the obtained Fe 3 o 4 Poor crystallinity and magnetic properties
The hydrothermal reaction method usually has limitations such as low purity, high cost and complicated operation, which limit its practical application

Method used

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  • Preparation method and application of superparamagnetic Fe3O4 nano material
  • Preparation method and application of superparamagnetic Fe3O4 nano material
  • Preparation method and application of superparamagnetic Fe3O4 nano material

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0033] Preparation Example 1: Preparation of superparamagnetic Fe 3 O 4 nanomaterials

[0034] (1) According to the molar ratio of 0.5:5, the solid FeCl 3 ·6H 2 O was dissolved in distilled water, and magnetically stirred at room temperature for 2 minutes to fully dissolve it to obtain solution a.

[0035] (2) Slowly add the triethanolamine (TEA) solution to solution a, the volume ratio of triethanolamine (TEA) to distilled water is 10:1, continue magnetic stirring for 2 minutes to obtain brown-red solution b.

[0036] (3) Adjust the pH of the solution b to 10 with solid NaOH to obtain a dark brown solution c.

[0037] (4) Put solution c into the reaction kettle, react at 180°C for 1.5 hours, take out the product by magnetic separation, and dry the obtained product in an oven at 60°C for 4 hours to obtain superparamagnetic Fe 3 O 4 nanomaterials.

[0038] figure 1 Is the XRD spectrum of the product obtained in Example 1, and the standard Fe 3 O 4 The spectrum (JCPDS: 76-1849) is availab...

preparation Embodiment 2

[0043] Preparation Example 2: Preparation of superparamagnetic Fe 3 O 4 nanomaterials

[0044] (1) According to the molar ratio of 0.1:5, the solid FeCl 3 ·6H 2 O was dissolved in distilled water, and magnetically stirred at room temperature for 1 minute to fully dissolve it to obtain solution a.

[0045] (2) Slowly add the triethanolamine (TEA) solution to solution a, the volume ratio of triethanolamine (TEA) to distilled water is 10:1, continue magnetic stirring for 3 minutes to obtain brown-red solution b.

[0046] (3) Adjust the pH of the solution b to 9 with ammonia water to obtain a dark brown solution c.

[0047] (4) Put solution c into the reaction kettle, react at 200°C for 2 hours, take out the product by magnetic separation method, and dry the obtained product in an oven at 50°C for 6 hours to obtain superparamagnetic Fe 3 O 4 nanomaterials.

preparation Embodiment 3

[0048] Preparation Example 3: Preparation of superparamagnetic Fe 3 O 4 nanomaterials

[0049] (1) According to the molar ratio of 0.5:15, the solid FeCl 3 ·6H 2 O was dissolved in distilled water, and magnetically stirred for 3 minutes at room temperature to fully dissolve it to obtain solution a.

[0050] (2) Slowly add the triethanolamine (TEA) solution to solution a, the volume ratio of triethanolamine (TEA) to distilled water is 10:1, continue magnetic stirring for 1 minute to obtain brown-red solution b.

[0051] (3) Adjust the pH of the solution b to 8 with ammonia water to obtain a dark brown solution c.

[0052] (4) Put solution c into the reaction kettle, react at 160℃ for 6 hours, take out the product by magnetic separation method, and dry the obtained product in an oven at 70℃ for 2 hours to obtain superparamagnetic Fe 3 O 4 nanomaterials.

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Abstract

The invention discloses a preparation method and application of a superparamagnetic Fe3O4 nano material, and relates to the technical field of nano materials. The preparation method comprises the following steps: dissolving solid FeCl3.6H2O into distilled water, stirring under room temperature, and fully dissolving, thus obtaining a solution a; slowly adding triethanolamine (TEA) into the solution a, continuously stirring, thus obtaining a brown red solution b, adjusting the pH value of the solution b by ammonia water or solid NaOH, thus obtaining a dark brown solution c, putting the solution c under a closed state for hydrothermal synthesis, and finally taking out a product by a magnetic separation method. The superparamagnetic Fe3O4 nano material prepared by the preparation method disclosed by the invehtion is better in water solubility, good in biocompatibility, high in adsorption performance and excellent in catalysis and magnetic property, can be applied to the fields such as magnetic resonance imaging, data storage, medicament and gene targeting, cell separation and sewage treatment, and has a wider application prospect.

Description

Technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a superparamagnetic Fe 3 O 4 Preparation methods and applications of nanomaterials. Background technique [0002] Superparamagnetic nanoparticles have important applications in magnetic resonance imaging, data storage, drug and gene targeting, cell separation, and hyperthermia. Fe 3 O 4 It has many advantages such as non-toxicity and low price, and can be used as magnetic fluid, magnetic resonance imaging and lithium battery electrode materials. Most of these applications require Fe 3 O 4 The material has high stability, small size and high dispersion performance. At the same time, research also shows that Fe 3 O 4 Bound state Fe 2+ / Fe 3+ , And H in solution 2 O 2 It can form a Fenton-like reaction system, which is applied to Fenton-like catalytic degradation of organic pollutants, and has potential application value in sewage treatment and environmental protection. Many prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/30C02F101/38
Inventor 韩成良张凌云朱德杰姚李徐泽忠
Owner HEFEI UNIV
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